Rod Reel Combo

[Jimbo]

I bought a Penn 555GS conventional and with the help of the Penn website matched it to a 7' Penn Slammer. My goal was to get a combo that would do double duty as a boat rod for light trolling and jigging, which it has done exceptionally well. I also wanted to be able to cast it in certain instances (boat or shore) wherein lies my problem. I have a feeling I know the answer, but a confirmation and any recommendations would he helpful. I don't find I'm getting the distance I expected though the reel is certainly capable of it. I'm thinking the rod is too short and stiff to adequately load it for a decent cast and may also be relating to some of my backlashes. My druther is to cast from shore with it.
Is a longer (i.e., 10-12' medium/heavy) rod and an understanding that one rod/reel combination isn't capable of handling every situation a possible solution to my casting woes. Ideally, I would like to throw 3+ oz. tin, and wood poppers and needlesfish I bought from another NJ member and finished myself.